Spin-up of the hyperon-softened accreting neutron stars
Abstract
We study the spin-up of the accreting neutron stars with a realistic hyperon-softened equation of state. Using precise 2D calculations we study the evolutionary tracks of accreting neutron stars in the angular-momentum - frequency planes. In contrast to the case of spinning-down solitary radio-pulsars, where a strong back-bending behavior has been observed, we do not see back-bending phenomena in the accretion-powered spinning-up case. We conclude that in the case of accretion-driven spin-up the back-bending is strongly suppressed by the mass-increase effect accompanying the angular-momentum increase.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 2005
- DOI:
- 10.1051/0004-6361:20052832
- arXiv:
- arXiv:astro-ph/0502140
- Bibcode:
- 2005A&A...441..207Z
- Keywords:
-
- dense matter;
- equation of state;
- stars: neutron;
- stars: binaries: general;
- Astrophysics
- E-Print:
- 5 pages, 5 figures, accepted by Astronomy &